DEPARTMENT OF
PHYSICAL CHEMISTRY
Physikalische Chemie - Direktor: Prof. Dr. Martin Wolf
Department Seminar
Host: T. Kumagai

Tuesday, October 30, 2018, 10:10 am
All are invited to meet around 9:50 am for a chat with coffee & cookies.
PC Seminar Room, G 2.06, Faradayweg 4
Prof. Kazuhiro Takanabe
Catalysis for Energy Conversion (CatEC), Department of Chemical System Engineering, University of Tokyo
Water splitting at near neutral pH: electrolyte engineering
Recent trend in renewable energy utilization necessitates new requirements for water splitting technology. For example, mild conditions at near neutral pH allow many electrode materials to be operational including many semiconductor photoelectrodes. However, fundamental understanding of water-splitting kinetics under such conditions is lacking. It is well accepted that buffering action is considered inevitable especially at high rates, but our elucidation pins down such effects quantitatively, dividing the functions into solution resistance, concentration overpotential, and kinetic contribution in an electrocatalytic systems. Optimization of electrolyte, or electrolyte engineering, led to the discovery of new reaction environments for improved water electrolysis in more benign conditions, and potentially towards membrane-less systems..
References:
ChemElectroChem, 2014, 1, 1497−1507; J. Power Sources, 2015, 287, 465−471; PCCP, 2015, 17, 15111−15114; J. Phys. Chem. C, 2015, 119, 20453−20458; J. Phys. Chem. C, 2016, 120, 1785-1794; J. Phys. Chem. C, 2016, 120, 24187-24196; J. Energy Chem. 2017, 26, 259-269; Angew. Chem. Int. Ed. 2017, 56, 5061-5065; ChemSusChem, 2017, 10, 1318-1336; ChemSusChem, 2017, 10, 4155-4162; Sustainable Energy Fuels 2018, 2, 2044-2052.